Some XMOS USB DACs, such as Chord QBD76 series, don't play DoP source with DLNA (UPNP with upmpdcli) if 'use_mmap' option disabled.

And in case of using DLNA Media Server such as JRiver and foobar2000 + upmpdcli + MPD, wrong information sent to DAC from MPD also without 'use_mmap' enabled, only noise played when playing 24bit music source.